2-[(3S,8R,9S,10R,13S,14S)-3-(tert-Butyl-dimethyl-silanyloxy)-10,13-dimethyl-1,2,3,4,7,8,9,10,11,12,13,14,15,16-tetradecahydro-cyclopenta[a]phenanthren-(17Z)-ylidene]-2-fluoro-ethanol 在
pyridine-SO3 complex 、 lithium aluminium tetrahydride 作用下,
以
四氢呋喃 为溶剂,
反应 3.0h,
以91%的产率得到tert-Butyl-{(3S,8R,9S,10R,13S,14S)-17-[1-fluoro-eth-(Z)-ylidene]-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-yloxy}-dimethyl-silane